<?php   

class SubPages{   
     
  private  $each_disNums;//每页显示的条目数   
  private  $nums;//总条目数   
  private  $current_page;//当前被选中的页   
  private  $sub_pages;//每次显示的页数   
  private  $pageNums;//总页数   
  private  $page_array = array();//用来构造分页的数组   
  private  $subPage_link;//每个分页的链接   
  private  $subPage_type;//显示分页的类型   
   /*  
   __construct是SubPages的构造函数，用来在创建类的时候自动运行.  
   @$each_disNums   每页显示的条目数  
   @nums     总条目数  
   @current_num     当前被选中的页  
   @sub_pages       每次显示的页数  
   @subPage_link    每个分页的链接  
   @subPage_type    显示分页的类型  
    
   当@subPage_type=1的时候为普通分页模式  
   example：   共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]  
   当@subPage_type=2的时候为经典分页样式  
   example：   当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]  
   */  
  function __construct($each_disNums,$nums,$current_page,$sub_pages,$subPage_link,$subPage_type){   
   $this->each_disNums=intval($each_disNums);   
   $this->nums=intval($nums);   
    if(!$current_page){   
    $this->current_page=1;   
    }else{   
    $this->current_page=intval($current_page);   
    }   
   $this->sub_pages=intval($sub_pages);   
   $this->pageNums=ceil($nums/$each_disNums);   
   $this->subPage_link=$subPage_link;    
   $this->show_SubPages($subPage_type);    
   //echo $this->pageNums."--".$this->sub_pages;   
  }   
     
     
  /*  
    __destruct析构函数，当类不在使用的时候调用，该函数用来释放资源。  
   */  
  function __destruct(){   
    unset($each_disNums);   
    unset($nums);   
    unset($current_page);   
    unset($sub_pages);   
    unset($pageNums);   
    unset($page_array);   
    unset($subPage_link);   
    unset($subPage_type);   
   }   
     
  /*  
    show_SubPages函数用在构造函数里面。而且用来判断显示什么样子的分页    
   */  
  function show_SubPages($subPage_type){   
    if($subPage_type == 1){   
    $this->subPageCss1();   
    }elseif ($subPage_type == 2){   
    $this->subPageCss2();   
    }   
   }   
     
     
  /*  
    用来给建立分页的数组初始化的函数。  
   */  
  function initArray(){   
    for($i=0;$i<$this->sub_pages;$i++){   
    $this->page_array[$i]=$i;   
    }   
    return $this->page_array;   
   }   
     
     
  /*  
    construct_num_Page该函数使用来构造显示的条目  
    即使：[1][2][3][4][5][6][7][8][9][10]  
   */  
  function construct_num_Page(){   
    if($this->pageNums < $this->sub_pages){   
    $current_array=array();   
     for($i=0;$i<$this->pageNums;$i++){    
     $current_array[$i]=$i+1;   
     }   
    }else{   
    $current_array=$this->initArray();   
     if($this->current_page <= 3){   
      for($i=0;$i<count($current_array);$i++){   
      $current_array[$i]=$i+1;   
      }   
     }elseif ($this->current_page <= $this->pageNums && $this->current_page > $this->pageNums - $this->sub_pages + 1 ){   
      for($i=0;$i<count($current_array);$i++){   
      $current_array[$i]=($this->pageNums)-($this->sub_pages)+1+$i;   
      }   
     }else{   
      for($i=0;$i<count($current_array);$i++){   
      $current_array[$i]=$this->current_page-2+$i;   
      }   
     }   
    }   
      
    return $current_array;   
   }   
     
  /*  
   构造普通模式的分页  
   共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]  
   */  
  function subPageCss1(){   
   $subPageCss1Str="";   
   $subPageCss1Str.="共".$this->nums."条记录，";   
   //$subPageCss1Str.="每页显示".$this->each_disNums."条，";   
   $subPageCss1Str.="当前第".$this->current_page."/".$this->pageNums."页 ";   
    if($this->current_page > 1){   
    $firstPageUrl=$this->subPage_link."1";   
    $prewPageUrl=$this->subPage_link.($this->current_page-1);   
    //$subPageCss1Str.="[<a href='$firstPageUrl'>首页</a>] ";
	$subPageCss1Str.="[<a href=''javascript:'>首页</a>] ";   
    $subPageCss1Str.="[<a href='$prewPageUrl'>上一页</a>] ";   
    }else {   
    $subPageCss1Str.="[首页] ";   
    $subPageCss1Str.="[上一页] ";   
    }   
      
    if($this->current_page < $this->pageNums){   
    $lastPageUrl=$this->subPage_link.$this->pageNums;   
    $nextPageUrl=$this->subPage_link.($this->current_page+1);   
    $subPageCss1Str.=" [<a href='$nextPageUrl'>下一页</a>] ";   
    $subPageCss1Str.="[<a href='$lastPageUrl'>尾页</a>] ";   
    }else {   
    $subPageCss1Str.="[下一页] ";   
    $subPageCss1Str.="[尾页] ";   
    }   
      
    echo $subPageCss1Str;   
      
   }   
     
     
  /*  
   构造经典模式的分页  
   当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]  
   */  
  function subPageCss2(){   
   $subPageCss2Str="";
   $subPageCss2Str.="共".$this->nums."条记录，"; 
   $subPageCss2Str.="当前第".$this->current_page."/".$this->pageNums."页 ";   
      
      
    if($this->current_page > 1){   
    $firstPageUrl=$this->subPage_link."1";   
    $prewPageUrl=$this->subPage_link.($this->current_page-1);
    $prewPageNum=$this->current_page-1;
    $subPageCss2Str.=" [<a href='#' onclick="."GetSearch(1,0,0,0,0,'project_no');>首页</a>]";   
    $subPageCss2Str.=" [<a href='#' onclick="."GetSearch($prewPageNum,0,0,0,0,'project_no');>上一页</a>]";   
    }else {   
    $subPageCss2Str.=" [首页]";   
    $subPageCss2Str.=" [上一页]";   
    }   
      
   $a=$this->construct_num_Page();   
    for($i=0;$i<count($a);$i++){   
    $s=$a[$i];   
     if($s == $this->current_page ){   
     $subPageCss2Str.=" <span style='color:red;font-weight:bold;'>".$s."</span>";   
     }else{   
     $url=$this->subPage_link.$s;   
     $subPageCss2Str.=" <a href='#' onclick="."GetSearch($s,0,0,0,0,'project_no');>".$s."</a>";   
     }   
    }   
      
    if($this->current_page < $this->pageNums){   
    $lastPageUrl=$this->subPage_link.$this->pageNums;   
    $nextPageUrl=$this->subPage_link.($this->current_page+1);
    $nextPageNum=$this->current_page+1;
    $subPageCss2Str.=" [<a href='#' onclick="."GetSearch($nextPageNum,0,0,0,0,'project_no');>下一页</a>]";   
    $subPageCss2Str.=" [<a href='#' onclick="."GetSearch($this->pageNums,0,0,0,0,'project_no')>尾页</a>]";   
    }else {   
    $subPageCss2Str.=" [下一页]";   
    $subPageCss2Str.=" [尾页] ";   
    }   
    echo $subPageCss2Str;   
   }   
}   
?>